Zeitschriften und Ausgaben

Volumen 49 (2022): Heft 2 (July 2022)

Volumen 49 (2022): Heft 1 (January 2022)

Volumen 48 (2021): Heft 2 (July 2021)

Volumen 48 (2021): Heft 1 (May 2021)

Volumen 47 (2020): Heft 2 (November 2020)
Special Heft: Invasive species in forest, agricultural and urban ecosystems

Volumen 47 (2020): Heft 1 (May 2020)

Volumen 46 (2019): Heft 2 (December 2019)

Volumen 46 (2019): Heft 1 (May 2019)

Volumen 45 (2018): Heft 2 (December 2018)

Volumen 45 (2018): Heft 1 (May 2018)

Volumen 44 (2017): Heft 2 (December 2017)

Volumen 44 (2017): Heft 1 (June 2017)

Zeitschriftendaten
Format
Zeitschrift
eISSN
1338-7014
Erstveröffentlichung
16 Apr 2017
Erscheinungsweise
2 Hefte pro Jahr
Sprachen
Englisch

Suche

Volumen 47 (2020): Heft 1 (May 2020)

Zeitschriftendaten
Format
Zeitschrift
eISSN
1338-7014
Erstveröffentlichung
16 Apr 2017
Erscheinungsweise
2 Hefte pro Jahr
Sprachen
Englisch

Suche

9 Artikel
Uneingeschränkter Zugang

Investigations of mature Scots pine stands in wind-throw areas in Norway spruce forests in Western Rhodopes

Online veröffentlicht: 13 May 2020
Seitenbereich: 1 - 9

Zusammenfassung

Abstract

We investigated the current health condition (defoliation), state of natural regeneration, and mycoflora and phytopathogen-caused attacks in Scots pine forests (Pinus sylvestris L.) planted in the 1960s in areas affected by wind disturbances in the West Rhodope Mountains in Bulgaria. Some damage types (resin outflow and anthropogenic damage) were present to a low extent in the research plots (S – Selishte and PK – Pobit Kamak). Some were missing completely (damage by deer and other animals, the presence of lignicolous fungi and abiotic damage). The most important results of this study were the following: i) the occurrence of the bark beetle pest Tomicus minor Hartig (Coleoptera, Scolytinae) was recorded on average in 4.6 (S) and 2.3 (PK) of fallen shoots under the tree crown within 1 m diameter around the stem; ii) significant damage to tree crowns due to the loss of assimilation organs in Scots pine trees (28% – S and 39% – PK, respectively) was several times higher than that recorded in Norway spruce (Picea abies L.) (10%); iii) tree species composition resulting from natural regeneration showed 95–100% proportion of Norway spruce despite the predominance of Scots pine in the maternal stand. These observations might provide evidence of unsuitable environmental conditions in the studied localities for pine forests on the southern range of the natural P. sylvestris occurrence. Forest management in similar ecological and climatic conditions should aim at significant diversification of the forest stand structure by utilizing tree species suitable for the given ecosystems.

Schlüsselwörter

  • Bulgaria
  • health status
  • mycoflora
  • phytopathology
  • L.
  • regeneration capability
Uneingeschränkter Zugang

Applying abundance/biomass comparison curves to small mammals: a weak tool for detect urbanization-related stress in the assemblages?

Online veröffentlicht: 13 May 2020
Seitenbereich: 10 - 15

Zusammenfassung

Abstract

Urbanization is a form of pervasive human-induced disturbance. We tested the effectiveness of Abundance/Biomass Comparisons (ABC) as an approach in detecting stress due to landscape urbanization in large small mammal assemblages obtained from pellets of Barn Owl (Tyto alba; Strigiformes). We compared three assemblages sampled in not urbanized contexts (agro-mosaic landscapes) with three assemblages preyed in highly urbanized contexts. In all assemblages, the role of strictly synanthropic species (in our case: rodents) emerged since almost all of total biomass was assigned to these species: indeed, everywhere (both in agro-mosaic and urbanized sites) species of low trophic level (i.e. omnivorous/herbivorous rodents) significantly prevail in biomass when compared to insectivorous species (i.e. shrews, Soricomorpha) linked to less anthropized habitats. This biomass dominance in rodent species is highlighted by the data on evenness, showing lower values in biomass when compared to abundance. This pattern did not match with the classic assumption expressed by the ABC model (i.e., species with higher biomass are typical of undisturbed assemblage) and could be wrongly interpreted. Our study evidenced as ABC approach is a not reliable tool to detect the effect of urbanization as landscape disturbance acting on small mammal assemblages. Therefore we suggest that the ABC assumptions are not universal but limited only to assemblages where high body mass species coincide to species of a higher trophic level.

Schlüsselwörter

  • abundance
  • biomass
  • dominance
  • disturbance
  • evenness
  • Italy
Uneingeschränkter Zugang

Beech bark disease in Slovakia related to fungi of the genus Nectria S.l. and the anatomy of necrotised bark and wood: a brief review

Online veröffentlicht: 13 May 2020
Seitenbereich: 16 - 22

Zusammenfassung

Abstract

This short review summarises the history and current knowledge regarding beech bark disease (BBD) in Slovakia. Moreover, the results of ongoing long-term disease monitoring are summarised. The article also provides a list of the 29 Nectria s.l. species found to date in Slovakia, complete with information about their occurrence on host tree species. Above all, we highlight the need for histopathological research on beech tissues attacked by different Nectria spp. Notably, neither the defensive response mechanisms of host cellular tissues at the anatomical and biochemical levels nor the strategy of decomposition by different pathogens have been explored in beech.

Schlüsselwörter

  • beech necrosis
  • L.
  • histopathology
  • s.l.
  • xylem tissues
Uneingeschränkter Zugang

Morphological variability of Bembidion varium (Coleoptera, Carabidae) in gradient of soil salinity

Online veröffentlicht: 13 May 2020
Seitenbereich: 23 - 33

Zusammenfassung

Abstract

This article discusses the effect of soil salinity on the variability of Bembidion (Notaphus) varium (Oliver, 1795). The authors of the article collected imagoes of this species in five ecosystems that differed in soil salinity; 13 linear characteristics, one angular characteristic and 6 morphometric indices were measured. Significant changes in six linear parameters of B. varium (body length, head length and width, width of prothorax between front angles, maximum width of prothorax and elytra width) and two morphometric indices are observed in the considered ecosystems. Soil salinity probably has the most impact on the variability of these characteristics. However, the influence of other important natural and anthropogenic factors is not ruled out. Significant differences between the sexes are observed for all linear parameters: females of B. varium are larger than males. There are no differences between males and females in morphometric indices. The head width, prothorax length and width, elytra length and width depend on the body length of B. varium individuals. The morphological variability of B. varium under the influence of other environmental factors needs further research.

Schlüsselwörter

  • morphometrics
  • population variability
  • riparian beetles
  • sexual dimorphism
Uneingeschränkter Zugang

Genotype-specific requirements for in vitro culture initiation and multiplication of Magnolia taxa

Online veröffentlicht: 13 May 2020
Seitenbereich: 34 - 44

Zusammenfassung

Abstract

The influence of basal media composition, concentration of plant growth regulators (PGRs), and the developmental stage of primary explants (dormancy, stage of bud opening and fruit ripening) on the initiation phase of nine Magnolia genotypes, including M. stellata /Sieb. & Zucc./Maxim., M. × soulangeana ‘Rustica Rubra’, M. denudata Desr., M. × soulangeana ‘Alexandrina’, M. liliiflora Desr., M. officinalis var. biloba Rehd. & Wils., M. salicifolia Maxim., M. × soulangeana ‘Lennei’, and M. kobus DC, was evaluated. The highest efficiency of primary culture initiation of seven Magnolia genotypes (except for M. liliiflora and M. salicifolia) was achieved from primary explants collected in the bud opening stage. A high positive correlation was found between total tannins and efficiency of the primary culture initiation at the fruit ripening stage (r = 0.833). Standardi and Catalano medium (S2) with 0.5 mg l−1 of 6-benzylaminopurine (BAP) was the most appropriate for multiplication of M. × soulangeana ‘Alexandrina’, whereas tissue cultures of M. × soulangeana ‘Lennei’ proliferated and grew better on S2 medium with 1.0 mg l−1 of BAP and 1.0 g l−1 of polyvinylpyrrolidone. The requirements for the composition of basal media and concentration of PGRs in the initiation and multiplication stages of micropropagation of various Magnolia species and cultivars are genotype-specific.

Schlüsselwörter

  • propagation
  • multiplication
  • primary culture initiation
Uneingeschränkter Zugang

Change in photosynthetic pigments of Date palm offshoots under abiotic stress factors

Online veröffentlicht: 13 May 2020
Seitenbereich: 45 - 51

Zusammenfassung

Abstract

Increasing world temperatures are bringing about climate changes creating abiotic stress in plants. Date palm offshoot leaves (Khadrawi cv.) were analyzed for chlorophyll Chl a, Chl b, Total Chl, Chl a/b ratio, anthocyanin and carotenoid subject to salinity, drought and temperature stress under field conditions. Results demonstrated that drought and salinity stress accompanied by high temperatures in July and August significantly reduced the Chl a, Chl b, and Total Chl relative to the control. Anthocyanins, carotenoids, hydrogen peroxide, and malondialdehyde were markedly higher in July and August (45 ºC), whereas September showed lower values in these substances. Temperature reduction to 35 °C accompanied by drought or salinity stress, brought about a critical increment in relative water content and a decrease in electrolyte leakage. Although the impact of drought and salinity stress continued, the reduced temperatures in September resulted in a reduction of abscisic acid and proline concentration. Cluster analysis showed the two groups. In this first group, the significant similarity between the treatments is illustrated by the influence of the high temperature of 43–45 ºC. Recovery of photosynthesis following low-temperature, for the most part, determines plant flexibility to water deficiencies and salinity. Thermal stress, associated with salinity or drought stress is more damaging to the photosynthetic pigments than any single factor.

Schlüsselwörter

  • antioxidative mechanism
  • electrolyte leakage
  • lipid peroxidation
  • L
Uneingeschränkter Zugang

A quantitative approach for conservation of endangered and endemic plants from Kosovo, SE Europe

Online veröffentlicht: 13 May 2020
Seitenbereich: 52 - 63

Zusammenfassung

Abstract

Basic patterns of most priority biodiversity areas of Kosovo that shall be considered for conservation studies are offered here. On this work, all plant taxa that are included in the Kosovarian Red list are analysed and their analogy is interpreted to conservation priority hotspots. Kosovo represents an important centre for Balkan biodiversity; therefore a quantitative evaluation of the importance of different priority areas for conserving plant diversity of Kosovo is very much needed. This study provides a detailed quantitative approach concerning the identification of priority areas for biodiversity conservation, using threatened and endangered plant taxa in well-known grid squares system. Used grid squares (20 × 20 km) were classified into four different groups in terms of their conservation importance. Valuation factors taken into account are IUCN based risk category, endemism as well as ecological and distributional attributes. The results indicated that there are four grid squares – D4 (0.4300), G7 (0.3910), G8 (0.2750) and E4 (0.2860), that have remarkable conservation importance. These grid squares are all located along mostly high-elevation areas of two National Parks in Kosovo. These national scale data should prove to be very appropriate and easy to follow evidence for environmental decision-making bodies as well as be used for further research.

Schlüsselwörter

  • IUCN
  • Kosovo
  • plant conservation
  • threatened plants
Uneingeschränkter Zugang

Effect of glutathione (GSH) on Date palm (Phoenix dactylifera L.) micropropagation

Online veröffentlicht: 13 May 2020
Seitenbereich: 64 - 69

Zusammenfassung

Abstract

The investigation was carried out to evaluate the influence of glutathione (GSH: levels 0, 0.1, 0.5 1.0, and 2.0 mM) on the callus growth, shoot multiplication and phytochemicals of in vitro shoots of the Date palm cv. Barhee. The optimum concentration of GSH was 1.0 mM. Such concentration improved the callus growth and increased its weight to 312.0 mg, the addition of this substance of the same concentration level showed the highest response rate and the number of shoots per jar (73.34 ± 2.69 and 8.83 ± 0.80 shoots/jar, respectively). Also, the 1.0 GSH application resulted in reducing the percentage of browning to 0.0 compared to the other concentrations. The results of the biochemical analysis revealed that treatments GSH of 0.1, 0.5 and 1.0 mM reduced the total soluble phenols compound (TSPC). These treatments were also more effectively reducing peroxidase (POD) and phenylalanine ammonia-lyase (PAL) activity than the concentrations of 2 mM or 0 (control treatment).

Schlüsselwörter

  • antioxidant substances
  • browning
  • phenols compound
  • phenylalanine ammonia-lyase (PAL)
  • shoot regeneration
Uneingeschränkter Zugang

Pedunculate oak stands in the catchments of the river Vorskla’s tributaries

Online veröffentlicht: 13 May 2020
Seitenbereich: 70 - 80

Zusammenfassung

Abstract

The aim of the study was to analyze the origin of oak stands within the catchments of the Vorskla’s tributaries and to describe their state. Covering 60,900 ha, pedunculate oak (Quercus robur L.) stands prevail and cover 51.1% of the total forest area of 119,200 ha in the catchment areas of the River Vorskla’s tributaries. The way oak stands are distributed in regards to trophotopes points at favourable conditions for their growth, as 81.7% of the area is a fresh fertile oak forest site type. Forest stands aged 41–80 years (39.8 % of the total area) and 81–120 years (50.4%) are prevailing. Natural oak stands cover almost 66.5% and planted ones grow at 33.5%. Distribution of oak stands in regards to the functional categories of forests shows a significant predominance of the protective forests. They cover 46.6% of the total area. The commercial forests cover 23.0%, the recreational ones make 18.8% and the forests with conservational, academic, historical and cultural purpose cover 11.6 %. Distribution patterns of oak forests in the catchments of the River Vorskla’s tributaries should be considered in the forest management in order to conserve their biodiversity and enhancing the performance of important environmental, protective, recreational and other functions. The article contains results of the study on the natural regeneration of Quercus robur and other wood species under the canopy of oak stands and on felling sites. The further research perspectives are a thorough study of the stand characteristics and the typological structure of forests in terms of certain wood species in the catchments of rivers all over Ukraine. It will help developing principles for the catchment and landscape zonation.

Schlüsselwörter

  • forest category
  • natural regeneration
  • L.
  • River Vorskla
  • tributary’s
9 Artikel
Uneingeschränkter Zugang

Investigations of mature Scots pine stands in wind-throw areas in Norway spruce forests in Western Rhodopes

Online veröffentlicht: 13 May 2020
Seitenbereich: 1 - 9

Zusammenfassung

Abstract

We investigated the current health condition (defoliation), state of natural regeneration, and mycoflora and phytopathogen-caused attacks in Scots pine forests (Pinus sylvestris L.) planted in the 1960s in areas affected by wind disturbances in the West Rhodope Mountains in Bulgaria. Some damage types (resin outflow and anthropogenic damage) were present to a low extent in the research plots (S – Selishte and PK – Pobit Kamak). Some were missing completely (damage by deer and other animals, the presence of lignicolous fungi and abiotic damage). The most important results of this study were the following: i) the occurrence of the bark beetle pest Tomicus minor Hartig (Coleoptera, Scolytinae) was recorded on average in 4.6 (S) and 2.3 (PK) of fallen shoots under the tree crown within 1 m diameter around the stem; ii) significant damage to tree crowns due to the loss of assimilation organs in Scots pine trees (28% – S and 39% – PK, respectively) was several times higher than that recorded in Norway spruce (Picea abies L.) (10%); iii) tree species composition resulting from natural regeneration showed 95–100% proportion of Norway spruce despite the predominance of Scots pine in the maternal stand. These observations might provide evidence of unsuitable environmental conditions in the studied localities for pine forests on the southern range of the natural P. sylvestris occurrence. Forest management in similar ecological and climatic conditions should aim at significant diversification of the forest stand structure by utilizing tree species suitable for the given ecosystems.

Schlüsselwörter

  • Bulgaria
  • health status
  • mycoflora
  • phytopathology
  • L.
  • regeneration capability
Uneingeschränkter Zugang

Applying abundance/biomass comparison curves to small mammals: a weak tool for detect urbanization-related stress in the assemblages?

Online veröffentlicht: 13 May 2020
Seitenbereich: 10 - 15

Zusammenfassung

Abstract

Urbanization is a form of pervasive human-induced disturbance. We tested the effectiveness of Abundance/Biomass Comparisons (ABC) as an approach in detecting stress due to landscape urbanization in large small mammal assemblages obtained from pellets of Barn Owl (Tyto alba; Strigiformes). We compared three assemblages sampled in not urbanized contexts (agro-mosaic landscapes) with three assemblages preyed in highly urbanized contexts. In all assemblages, the role of strictly synanthropic species (in our case: rodents) emerged since almost all of total biomass was assigned to these species: indeed, everywhere (both in agro-mosaic and urbanized sites) species of low trophic level (i.e. omnivorous/herbivorous rodents) significantly prevail in biomass when compared to insectivorous species (i.e. shrews, Soricomorpha) linked to less anthropized habitats. This biomass dominance in rodent species is highlighted by the data on evenness, showing lower values in biomass when compared to abundance. This pattern did not match with the classic assumption expressed by the ABC model (i.e., species with higher biomass are typical of undisturbed assemblage) and could be wrongly interpreted. Our study evidenced as ABC approach is a not reliable tool to detect the effect of urbanization as landscape disturbance acting on small mammal assemblages. Therefore we suggest that the ABC assumptions are not universal but limited only to assemblages where high body mass species coincide to species of a higher trophic level.

Schlüsselwörter

  • abundance
  • biomass
  • dominance
  • disturbance
  • evenness
  • Italy
Uneingeschränkter Zugang

Beech bark disease in Slovakia related to fungi of the genus Nectria S.l. and the anatomy of necrotised bark and wood: a brief review

Online veröffentlicht: 13 May 2020
Seitenbereich: 16 - 22

Zusammenfassung

Abstract

This short review summarises the history and current knowledge regarding beech bark disease (BBD) in Slovakia. Moreover, the results of ongoing long-term disease monitoring are summarised. The article also provides a list of the 29 Nectria s.l. species found to date in Slovakia, complete with information about their occurrence on host tree species. Above all, we highlight the need for histopathological research on beech tissues attacked by different Nectria spp. Notably, neither the defensive response mechanisms of host cellular tissues at the anatomical and biochemical levels nor the strategy of decomposition by different pathogens have been explored in beech.

Schlüsselwörter

  • beech necrosis
  • L.
  • histopathology
  • s.l.
  • xylem tissues
Uneingeschränkter Zugang

Morphological variability of Bembidion varium (Coleoptera, Carabidae) in gradient of soil salinity

Online veröffentlicht: 13 May 2020
Seitenbereich: 23 - 33

Zusammenfassung

Abstract

This article discusses the effect of soil salinity on the variability of Bembidion (Notaphus) varium (Oliver, 1795). The authors of the article collected imagoes of this species in five ecosystems that differed in soil salinity; 13 linear characteristics, one angular characteristic and 6 morphometric indices were measured. Significant changes in six linear parameters of B. varium (body length, head length and width, width of prothorax between front angles, maximum width of prothorax and elytra width) and two morphometric indices are observed in the considered ecosystems. Soil salinity probably has the most impact on the variability of these characteristics. However, the influence of other important natural and anthropogenic factors is not ruled out. Significant differences between the sexes are observed for all linear parameters: females of B. varium are larger than males. There are no differences between males and females in morphometric indices. The head width, prothorax length and width, elytra length and width depend on the body length of B. varium individuals. The morphological variability of B. varium under the influence of other environmental factors needs further research.

Schlüsselwörter

  • morphometrics
  • population variability
  • riparian beetles
  • sexual dimorphism
Uneingeschränkter Zugang

Genotype-specific requirements for in vitro culture initiation and multiplication of Magnolia taxa

Online veröffentlicht: 13 May 2020
Seitenbereich: 34 - 44

Zusammenfassung

Abstract

The influence of basal media composition, concentration of plant growth regulators (PGRs), and the developmental stage of primary explants (dormancy, stage of bud opening and fruit ripening) on the initiation phase of nine Magnolia genotypes, including M. stellata /Sieb. & Zucc./Maxim., M. × soulangeana ‘Rustica Rubra’, M. denudata Desr., M. × soulangeana ‘Alexandrina’, M. liliiflora Desr., M. officinalis var. biloba Rehd. & Wils., M. salicifolia Maxim., M. × soulangeana ‘Lennei’, and M. kobus DC, was evaluated. The highest efficiency of primary culture initiation of seven Magnolia genotypes (except for M. liliiflora and M. salicifolia) was achieved from primary explants collected in the bud opening stage. A high positive correlation was found between total tannins and efficiency of the primary culture initiation at the fruit ripening stage (r = 0.833). Standardi and Catalano medium (S2) with 0.5 mg l−1 of 6-benzylaminopurine (BAP) was the most appropriate for multiplication of M. × soulangeana ‘Alexandrina’, whereas tissue cultures of M. × soulangeana ‘Lennei’ proliferated and grew better on S2 medium with 1.0 mg l−1 of BAP and 1.0 g l−1 of polyvinylpyrrolidone. The requirements for the composition of basal media and concentration of PGRs in the initiation and multiplication stages of micropropagation of various Magnolia species and cultivars are genotype-specific.

Schlüsselwörter

  • propagation
  • multiplication
  • primary culture initiation
Uneingeschränkter Zugang

Change in photosynthetic pigments of Date palm offshoots under abiotic stress factors

Online veröffentlicht: 13 May 2020
Seitenbereich: 45 - 51

Zusammenfassung

Abstract

Increasing world temperatures are bringing about climate changes creating abiotic stress in plants. Date palm offshoot leaves (Khadrawi cv.) were analyzed for chlorophyll Chl a, Chl b, Total Chl, Chl a/b ratio, anthocyanin and carotenoid subject to salinity, drought and temperature stress under field conditions. Results demonstrated that drought and salinity stress accompanied by high temperatures in July and August significantly reduced the Chl a, Chl b, and Total Chl relative to the control. Anthocyanins, carotenoids, hydrogen peroxide, and malondialdehyde were markedly higher in July and August (45 ºC), whereas September showed lower values in these substances. Temperature reduction to 35 °C accompanied by drought or salinity stress, brought about a critical increment in relative water content and a decrease in electrolyte leakage. Although the impact of drought and salinity stress continued, the reduced temperatures in September resulted in a reduction of abscisic acid and proline concentration. Cluster analysis showed the two groups. In this first group, the significant similarity between the treatments is illustrated by the influence of the high temperature of 43–45 ºC. Recovery of photosynthesis following low-temperature, for the most part, determines plant flexibility to water deficiencies and salinity. Thermal stress, associated with salinity or drought stress is more damaging to the photosynthetic pigments than any single factor.

Schlüsselwörter

  • antioxidative mechanism
  • electrolyte leakage
  • lipid peroxidation
  • L
Uneingeschränkter Zugang

A quantitative approach for conservation of endangered and endemic plants from Kosovo, SE Europe

Online veröffentlicht: 13 May 2020
Seitenbereich: 52 - 63

Zusammenfassung

Abstract

Basic patterns of most priority biodiversity areas of Kosovo that shall be considered for conservation studies are offered here. On this work, all plant taxa that are included in the Kosovarian Red list are analysed and their analogy is interpreted to conservation priority hotspots. Kosovo represents an important centre for Balkan biodiversity; therefore a quantitative evaluation of the importance of different priority areas for conserving plant diversity of Kosovo is very much needed. This study provides a detailed quantitative approach concerning the identification of priority areas for biodiversity conservation, using threatened and endangered plant taxa in well-known grid squares system. Used grid squares (20 × 20 km) were classified into four different groups in terms of their conservation importance. Valuation factors taken into account are IUCN based risk category, endemism as well as ecological and distributional attributes. The results indicated that there are four grid squares – D4 (0.4300), G7 (0.3910), G8 (0.2750) and E4 (0.2860), that have remarkable conservation importance. These grid squares are all located along mostly high-elevation areas of two National Parks in Kosovo. These national scale data should prove to be very appropriate and easy to follow evidence for environmental decision-making bodies as well as be used for further research.

Schlüsselwörter

  • IUCN
  • Kosovo
  • plant conservation
  • threatened plants
Uneingeschränkter Zugang

Effect of glutathione (GSH) on Date palm (Phoenix dactylifera L.) micropropagation

Online veröffentlicht: 13 May 2020
Seitenbereich: 64 - 69

Zusammenfassung

Abstract

The investigation was carried out to evaluate the influence of glutathione (GSH: levels 0, 0.1, 0.5 1.0, and 2.0 mM) on the callus growth, shoot multiplication and phytochemicals of in vitro shoots of the Date palm cv. Barhee. The optimum concentration of GSH was 1.0 mM. Such concentration improved the callus growth and increased its weight to 312.0 mg, the addition of this substance of the same concentration level showed the highest response rate and the number of shoots per jar (73.34 ± 2.69 and 8.83 ± 0.80 shoots/jar, respectively). Also, the 1.0 GSH application resulted in reducing the percentage of browning to 0.0 compared to the other concentrations. The results of the biochemical analysis revealed that treatments GSH of 0.1, 0.5 and 1.0 mM reduced the total soluble phenols compound (TSPC). These treatments were also more effectively reducing peroxidase (POD) and phenylalanine ammonia-lyase (PAL) activity than the concentrations of 2 mM or 0 (control treatment).

Schlüsselwörter

  • antioxidant substances
  • browning
  • phenols compound
  • phenylalanine ammonia-lyase (PAL)
  • shoot regeneration
Uneingeschränkter Zugang

Pedunculate oak stands in the catchments of the river Vorskla’s tributaries

Online veröffentlicht: 13 May 2020
Seitenbereich: 70 - 80

Zusammenfassung

Abstract

The aim of the study was to analyze the origin of oak stands within the catchments of the Vorskla’s tributaries and to describe their state. Covering 60,900 ha, pedunculate oak (Quercus robur L.) stands prevail and cover 51.1% of the total forest area of 119,200 ha in the catchment areas of the River Vorskla’s tributaries. The way oak stands are distributed in regards to trophotopes points at favourable conditions for their growth, as 81.7% of the area is a fresh fertile oak forest site type. Forest stands aged 41–80 years (39.8 % of the total area) and 81–120 years (50.4%) are prevailing. Natural oak stands cover almost 66.5% and planted ones grow at 33.5%. Distribution of oak stands in regards to the functional categories of forests shows a significant predominance of the protective forests. They cover 46.6% of the total area. The commercial forests cover 23.0%, the recreational ones make 18.8% and the forests with conservational, academic, historical and cultural purpose cover 11.6 %. Distribution patterns of oak forests in the catchments of the River Vorskla’s tributaries should be considered in the forest management in order to conserve their biodiversity and enhancing the performance of important environmental, protective, recreational and other functions. The article contains results of the study on the natural regeneration of Quercus robur and other wood species under the canopy of oak stands and on felling sites. The further research perspectives are a thorough study of the stand characteristics and the typological structure of forests in terms of certain wood species in the catchments of rivers all over Ukraine. It will help developing principles for the catchment and landscape zonation.

Schlüsselwörter

  • forest category
  • natural regeneration
  • L.
  • River Vorskla
  • tributary’s

Planen Sie Ihre Fernkonferenz mit Scienceendo